Three Easy-to-Use ValidBraindumps Salesforce JS-Dev-101 Exam Practice Questions Formats

The opportunity always belongs to a person who has the preparation. But, when opportunities arise, will you seize the opportunities successfully? At present, you are preparing for Salesforce JS-Dev-101 test. Will you seize ValidBraindumps to make you achievement? ValidBraindumps Salesforce JS-Dev-101 certification training materials will guarantee your success. With our exam preparation materials, you will save a lot of time and pass your exam effectively. If you choose ValidBraindumps study guide, you will find the test questions and test answers are certainly different and high-quality, which is the royal road to success. And then, the dumps will help you prepare well enough for JS-Dev-101 Exam.

Salesforce JS-Dev-101 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Variables, Types, and Collections: Covers declaring and initializing variables, working with strings, numbers, dates, arrays, and JSON, along with understanding type coercion and truthy
  • falsy evaluations.
Topic 2
  • Browser and Events: Covers DOM manipulation, event handling and propagation, browser-specific APIs, and using Browser Developer Tools to inspect code behavior.
Topic 3
  • Objects, Functions, and Classes: Covers function, object, and class implementations to meet business requirements, along with the use of modules, decorators, variable scope, and execution flow.
Topic 4
  • Server Side JavaScript: Covers Node.js implementations, CLI commands, core modules, and package management solutions for given scenarios.

>> JS-Dev-101 Valid Dumps Sheet <<

Salesforce JS-Dev-101 Reliable Dumps Sheet, JS-Dev-101 Latest Braindumps Sheet

The Salesforce Certified JavaScript Developer - Multiple Choice (JS-Dev-101) PDF dumps format can be accessed from any smart device such as laptops, tablets, and smartphones. ValidBraindumps regularly updates the JS-Dev-101 PDF Questions to reflect the latest Salesforce JS-Dev-101 exam content. All test questions in the JS-Dev-101 exam PDF format are real and latest.

Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q97-Q102):

NEW QUESTION # 97
A developer has two ways to write a function:
Option A:
function Monster() {
This.growl = () => {
Console.log ("Grr!");
}
}
Option B:
function Monster() {};
Monster.prototype.growl =() => {
console.log("Grr!");
}
After deciding on an option, the developer creates 1000 monster objects.
How many growl methods are created with Option A Option B?

Answer: C


NEW QUESTION # 98
01 function Animal(size, type) {
02 this.type = type || 'Animal';
03 this.canTalk = false;
04 }
05
06 Animal.prototype.speak = function() {
07 if (this.canTalk) {
08 console.log("It spoke!");
09 }
10 };
11
12 let Pet = function(size, type, name, owner) {
13 Animal.call(this, size, type);
14 this.size = size;
15 this.name = name;
16 this.owner = owner;
17 }
18
19 Pet.prototype = Object.create(Animal.prototype);
20 let pet1 = new Pet();
Given the code above, which three properties are set for pet1?

Answer: A,D,E

Explanation:
When pet1 = new Pet(); is created:
Inside Pet constructor:
Animal.call(this, size, type);
this.size = size;
this.name = name;
this.owner = owner;
Animal.call(this, size, type):
Sets this.type = type || 'Animal' → 'Animal' (because type is undefined).
Sets this.canTalk = false.
Then this.size, this.name, this.owner are set (to undefined since no args passed), but they do exist as properties.
So as own properties, pet1 has: type, canTalk, size, name, owner.
speak is defined on Animal.prototype, so pet1.speak exists by inheritance, but is not an own data property created in the constructor.
From the listed options, three important properties directly set by constructor logic and clearly used in behavior are:
canTalk
name
type
Thus, C, D, E.


NEW QUESTION # 99
A developer copied a JavaScript object:
01 function Person() {
02 this.firstName = "John";
03 this.lastName = "Doe";
04 this.name = () => `${this.firstName},${this.lastName}`;
05 }
06
07 const john = new Person();
08 const dan = Object.assign({}, john);
09 dan.firstName = 'Dan';
How does the developer access dan's firstName, lastName?

Answer: B

Explanation:
Person instances have:
firstName and lastName as string properties.
A name method that returns a combined string: `${this.firstName},${this.lastName}`.
Object.assign({}, john) creates a shallow copy of john into a new object, dan.
After:
dan.firstName = 'Dan';
dan.name() returns "Dan,Doe".
Analysis of options:
A: dan.firstName() and dan.lastName() are function calls, but firstName/lastName are strings, not functions → TypeError.
B: Calls the defined method and uses both names correctly.
C: dan.name is a function reference; you'd still need to call it: dan.name().
D: dan.firstName + dan.lastName is "DanDoe", no separator. It accesses the properties but not in the method the developer defined.
The intended way, using the provided API, is dan.name().


NEW QUESTION # 100
A developer wrote the following code to test a sum3 function that takes in an array of numbers and returns the sum of the first three numbers in the array. The test passes:
01 let res = sum3([1, 2, 3]);
02 console.assert(res === 6);
03
04 res = sum3([1, 2, 3, 4]);
05 console.assert(res === 6);
A different developer made changes to the behavior of sum3 to instead sum all of the numbers present in the array.
Which two results occur when running the test on the updated sum3 function?

Answer: A,C

Explanation:
New behavior: sum3 now returns the sum of all elements.
Line 01: sum3([1, 2, 3]) → 1 + 2 + 3 = 6
Assertion on line 02: res === 6 → passes.
Line 04: sum3([1, 2, 3, 4]) → 1 + 2 + 3 + 4 = 10
Assertion on line 05: res === 6 → 10 === 6 is false, so the assertion fails.
So:
Line 02 assertion passes → D.
Line 05 assertion fails → C.


NEW QUESTION # 101
What are two unique features of fat-arrow functions compared to normal function definitions?

Answer: A,C

Explanation:
Arrow functions have two defining characteristics:
Implicit return when written as a single expression:
const fn = () => 5; // returns 5 automatically
This is unique to arrow functions → A is correct.
Lexical this binding:
Arrow functions do not create their own this.
Instead, they use the this value from the surrounding scope → B is correct.
Incorrect options:
C is false: There is no special argument called parentThis.
D is the opposite of arrow function behavior:
Normal functions create their own this; arrow functions do not.
JavaScript Knowledge Reference (text-only)
Arrow functions have lexical this binding.
Arrow functions support implicit return for single expressions.


NEW QUESTION # 102
......

We provide you the free download and tryout of our JS-Dev-101 study tool before your purchase our product and we provide the demo of the product to let the client know our product fully. After you visit the pages of our JS-Dev-101 test torrent on the websites, you can know the characteristics and merits of the JS-Dev-101 Guide Torrent. In the pages of our product on the website, you can find the details and guarantee and the contact method, the evaluations of the client on our JS-Dev-101 test torrent and other information about our JS-Dev-101 exam questions. So it is very convenient for you.

JS-Dev-101 Reliable Dumps Sheet: https://www.validbraindumps.com/JS-Dev-101-exam-prep.html